Mixed-metal Ionothermal Synthesis of Metallophthalocyanine Covalent Organic Frameworks for CO₂ Capture and Conversion
Abstract
Phthalocyanines (PCs) are intriguing building blocks owing to their stability, physicochemical and catalytic properties. Although PC-based polymers have been reported before, many suffer from relatively low stability, crystallinity, and low surface areas. Utilizing a mixed-metal salt ionothermal approach, we report the synthesis of a series of metallophthalocyanine-based covalent organic frameworks (COFs) starting from 1,2,4,5-tetracyanobenzene and 2,3,6,7-tetracyanoanthracene to form the corresponding COFs named M-pPPCs and M-anPPCs, respectively. The obtained COFs followed the Irving–Williams series in their metal contents, surface areas, and pore volume and featured excellent CO₂ uptake capacities up to 7.6 mmol g⁻¹ at 273 K, 1.1 bar. We also investigated the growth of the Co-pPPC and Co-anPPC on a highly conductive carbon nanofiber and demonstrated their high catalytic activity in the electrochemical CO₂ reduction, which showed Faradaic efficiencies towards CO up to 74 % at −0.64 V vs. RHE. Show more
Permanent link
https://doi.org/10.3929/ethz-b-000627413Publication status
publishedExternal links
Journal / series
Angewandte Chemie. International EditionVolume
Pages / Article No.
Publisher
Wiley-VCHSubject
CO2 Capture; Covalent Organic Frameworks; Electrocatalysis; Ionothermal Synthesis; PhthalocyanineOrganisational unit
09654 - Mougel, Victor / Mougel, Victor
Funding
853064 - Hybrid Electrocatalysts Inspired by the Nitrogenase Enzyme (EC)
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